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For those subscales with sufficient items, analyses supported unidimensionality.
An evaluable questionnaire had sufficient items to allow calculation of at least one FACT-P subscale.
*The SF-6D was regarded as complete if there were sufficient items to calculate a utility score.
While four domains had sufficient items to test dimensionality and appeared to be unidimensional, overall fit to the Rasch model was poor.
In addition, with a limited set of items it is unlikely that sufficient items would be found that cover the construct as well as all having the same discrimination.
Future research could also examine testing more items along with those tested in this study to determine if these change the variance accounted for by the two factors or if other factors emerge with sufficient items for additional subscales.
Similar(51)
Both questionnaires showed sufficient item to item convergent validity and item discriminant validity.
94 of 141 (65%) persons sent back the follow up questionnaire, including 89 with sufficient item response for reliability analysis.
Thus, the findings of the current study were indicative of sufficient item-total reliability for the PSS and PSS-J.
Thus, the indicators measuring each construct in the present study all carried sufficient item reliability, as shown in Table 6.
Construct validity was supported by the sufficient item-total correlations where all except one reached the more stringent criteria suggested for final testing of scales (>0.4) [ 32].
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CEO of Professional Science Editing for Scientists @ prosciediting.com